of Exotic Sjjecles of Lucanida. 431 



indeed the want of the opposite sex, joined to the broken con- 

 dition of the antennas in the specimen which I have examined, 

 leaves it doubtful whether it be rightly referred to the genus 

 Sinodendron, with which it agrees in the porrected scapes on 

 which the labial palpi are placed ; but the palpi, both maxillary 

 and labial, are much larger than in S. cylindriciim. 



The upper surface is very convex ; black, polished, with the 

 sides of the prothorax and elytra, and suture of the latter, obscure 

 pitchy-red ; covered with large, close, variolose, circular punctures, 

 those at the sides of the prothorax and hind part of the elytra 

 emitting whitish-bufF scales. The head is small, transverse, nar- 

 rowed in front, the crown having a small raised polished semicir- 

 cular ridge in the middle, between the eyes. The eyes are entire: 

 the clypeus is small and transverse, in front of which the small 

 transverse labrum is affixed. The mandibles are very small, 

 broad, sub-triangular, with three minute obtuse teeth at the apex. 

 The maxillae are small and penicillated ; neither of the lobes are 

 armed with a horny hook. The mentum is small, transverse, with 

 the anterior angles rounded, clothed sparingly with long reflexed 

 hairs ; the fore-margin straight, having the small entire setose 

 labium porrected at its centre, the labial palpi arising from two 

 broad porrected scapes. The palpi (both maxillary and labial) 

 are moderately long and slender. The basal joint of the antennae 

 is rather long and very curved. The prothorax is as broad at its 

 base as the elytra, but its sides are gradually rounded and narrow- 

 ing to the head ; its lateral margins are finely serrated and the disc 

 marked with an irregular, central, longitudinal, wide, polished line, 

 and two elongated patches in front and two behind, rather raised 

 and polished ; the middle of the hind-margin is extended back- 

 wards toward the scutellum. 



The elytra are very convex, about half as long again as they are 

 wide, covered with punctures, each having four slightly defined 

 longitudinal ridges, upon which the punctures are not so close as 

 they are on the intervening depressed spaces. The legs are 

 moderately long, the anterior tibiae slender and curved, with 

 thirteen irregular-sized denticulations, and with a strong spine 

 near the apex, which also forms a curved spine. The inter- 

 mediate and posterior tibiee are armed with a central spine and 

 several minute denticles. The body beneath is black, glossy, and 

 less strongly punctured than on the upper surface,* 



* See note, p. 437, 



